Vibration-absorbing support.



F. S. BOERRIES.

VIBRATION ABSORBING SUPPORT.

APPLICATION FILED luu'sz. 1913.

1 1 3 9, 1 5 8 Patented May 11, 1915.

2 SHEETS-SHEET l- F. S. BOERRIES. VIBRATION ABSORBNG SUPPORT. APPLICATION HLED sun 52, 1913.

1 1 39, l 5 Patented May 11, 1915.

2 sHEETs-sHEET 2.

STATES PATENT orrrcn.

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To all whom it may concern:

Be it known that I, Fmiminro S'mirHnN Bonimrns, citizen of the French Republic, residing at 45 Rue Guersant, Paris, France, have invented new and useful Improvements in Vibration-Absorbing Supports, of which the following is a, specification.

This invention has reference to a means of suspending and attaching electric motors or the like, avoiding any rigid contact with fixed walls and absolutely absorbing all v1- brations. As a matter of fact it is known that in spite of all the precautions taken for setting up the frame or bedplate of engines, it is difiicult and often impossible even to avoid vibrations, which are transmitted through the foundations or wooden or iron means and which are reflected sometimes to very great distances, thereby injuriously affecting in certain cases the correct running of the machines driven, more particularly if these machines or apparatus are very sensitive, and furthermore occasioning a disagreeable deafening noise. The engines are generally rigidly attached at their base to a bedplate, often of cement, the foundations of which are sometimes very deep.

In the means forming the subject matter of the present invention on the contrary the engine is suspended by isolating it in any way from any wall or rigid base.

I will now describe my invention with reference to the accompanying drawing showing one method of realizing the same as applied to the case of an electromotor by way of example, and in which:

Figure 1 is a front view of the suspended motor. Fig. 2 is a side view of the same. Fig. 3 is a plan-view of the frame supporting the motor.

Referring to these drawings, 1 is an ordinary electromotor, on the shaft of which is keyed a pulley 2 which transmits the movement to the driven machine. The base 3 of the motor is rigidly fastened to a heavy mass 4, the function of which is hereinafter described. This fastenin is eflected by bolts 5. The whole system ormed by the motor 1 and the mass lcis suspended by belts or cables 6-7 to cross beams 8 attached to the rectangular frame shown in Fig. 3. These cross beams of rectangular, round or other section serve as supports for sliding sleeves 9, to the ends of which are fitted loops 10 held at their proper distance apart by annular flanges 11 of the sleeve 9. The sus- Specification of Letters Patent. n ncatidlifired Jul 12,1915. has no. 775,762.

. Patented May 11, 1915.

pension belts of the group formed by the motor 1 and the mass 4 rest on these loops 10. The rectangular frame consists of two beams 12 and two cross beams 8 and is supported by hanger rods 13 rigidly fitted at thelr upper portion in a floor or other support 14. These hanger rods 13 pass freely in holes formed in the beams 12 which rest on elastic washers 15 resting against a steel washer 16 and a sleeve 17 adjustable as regards height by means of the nuts 18. It will thus be seen that the whole of the device is suspended by intermediation of elastic washers which absorb all the vibrations occasioned by the working of the motor. The heavy mass 4 is for the purposes of counterbalancing the efforts which tend to raise up the motor when the latter is working. Its weight should consequently be determined by the power of the motor and the effort to be transmitted. Furthermore this mass absorbs the greater portion of the vibrations which is relatively intense below the axis of the motor.

This method of suspending electric motors 7 permits, as may be easily seen from the accompanying drawings, of regulating on the one hand the tension of the driving belt 19 and on the other hand the longitudinal position of the motor by intermediation of the sliding sleeves 9 which can be held in position by the set screws 20.

The invention has been described and shown as applied to an electric motor, but it must be understood that it can be applied to any other motors for whatever use they may be intended. It is preferably applied to motors intended to drive sensitive apparatus and more particularly those for driving the mechanism of phonographs in which the slightest vibration is objectionable.

Claims:

1.- In a supfpcrt for motors, the combination with a rame,-of a floating platform suspended from said frame, hanger rods members connecting said cross beams 'to said beams, a motor "platform, and nonform therewith a rectangular supporting metallic flexible straps connecting said platstructure, sleeves slidably mounted on said form to said sleeves.

- connecting members, and non-metallic straps In testimony whereof I have signed my 5 flexibly suspending said platform from said name to this specification in the presence of 15 sleeves. two subscribing witnesses.

4. In a vibration absorbing support for FREDERIG STEPHEN BOERRIES. motors, the combination with a supportin Witnesses:

structure comprising resiliently suspende HANSON C. COKE, 1O cross beams, of sleeves slidably mounted on MIGUEL FEROLO. 

